UI changes on native to allow account deletion for SIWE accounts

Summary: This differential adjusts account deletion panel on native to allow account deletion for SIWE accounts and still require non-empty password to delete conventional account.

Test Plan: For conventional account - ensure deletion process is not altered. For SIWE accounts - go to account deleter panel and ensure there is no password input prompt and just clicking on DELETE button succesfully deletes account.

Reviewers: tomek, atul

Reviewed By: tomek

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D6099